X-Git-Url: http://git.asbjorn.biz/?a=blobdiff_plain;f=src%2Fdata.js;h=500f7ea43f0508c41410e28eff2b661b85dd6991;hb=70b9aed422c34047299fe6e8934902fae61f2a3e;hp=03116e4b10ed9223b4becec72b407bce03995ddd;hpb=991d039b62f5dfcb9e3d99fe28212a6874e8f5c7;p=jquery.git

diff --git a/src/data.js b/src/data.js
index 03116e4..500f7ea 100644
--- a/src/data.js
+++ b/src/data.js
@@ -1,31 +1,45 @@
 var expando = "jQuery" + now(), uuid = 0, windowData = {};
+var emptyObject = {};
 
 jQuery.extend({
 	cache: {},
+	
+	expando:expando,
 
 	data: function( elem, name, data ) {
 		elem = elem == window ?
 			windowData :
 			elem;
 
-		var id = elem[ expando ], cache = jQuery.cache;
+		var id = elem[ expando ], cache = jQuery.cache, thisCache;
 
-		// Compute a unique ID for the element
-		if(!id) id = elem[ expando ] = ++uuid;
-
-		// Only generate the data cache if we're
-		// trying to access or manipulate it
-		if ( name && !cache[ id ] )
-			cache[ id ] = {};
+		// Handle the case where there's no name immediately
+		if ( !name && !id ) {
+			return null;
+		}
 
-		var thisCache = cache[ id ];
+		// Compute a unique ID for the element
+		if ( !id ) { 
+			id = ++uuid;
+		}
 
+		// Avoid generating a new cache unless none exists and we
+		// want to manipulate it.
+		if ( cache[ id ] ) {
+			thisCache = cache[ id ];
+		} else if ( typeof data === "undefined" ) {
+			thisCache = emptyObject;
+		} else {
+			thisCache = cache[ id ] = {};
+		}
+		
 		// Prevent overriding the named cache with undefined values
-		if ( data !== undefined ) thisCache[ name ] = data;
-
-		if(name === true) return thisCache
-		else if(name) return thisCache[name]
-		else return id
+		if ( data !== undefined ) {
+			elem[ expando ] = id;
+			thisCache[ name ] = data;
+		}
+		
+		return name ? thisCache[ name ] : thisCache;
 	},
 
 	removeData: function( elem, name ) {
@@ -42,8 +56,9 @@ jQuery.extend({
 				delete thisCache[ name ];
 
 				// If we've removed all the data, remove the element's cache
-				if( jQuery.isEmptyObject(thisCache) )
+				if ( jQuery.isEmptyObject(thisCache) ) {
 					jQuery.removeData( elem );
+				}
 			}
 
 		// Otherwise, we want to remove all of the element's data
@@ -51,17 +66,19 @@ jQuery.extend({
 			// Clean up the element expando
 			try {
 				delete elem[ expando ];
-			} catch(e){
+			} catch( e ) {
 				// IE has trouble directly removing the expando
 				// but it's ok with using removeAttribute
-				if ( elem.removeAttribute )
+				if ( elem.removeAttribute ) {
 					elem.removeAttribute( expando );
+				}
 			}
 
 			// Completely remove the data cache
 			delete cache[ id ];
 		}
 	},
+	
 	queue: function( elem, type, data ) {
 		if( !elem ) return;
 
@@ -99,7 +116,9 @@ jQuery.extend({
 
 jQuery.fn.extend({
 	data: function( key, value ){
-		if(typeof key === "undefined" && this.length) return jQuery.data(this[0], true);
+		if ( typeof key === "undefined" && this.length ) {
+			return jQuery.data( this[0] );
+		}
 
 		var parts = key.split(".");
 		parts[1] = parts[1] ? "." + parts[1] : "";
@@ -148,4 +167,4 @@ jQuery.fn.extend({
 	clearQueue: function(type){
 		return this.queue( type || "fx", [] );
 	}
-});
\ No newline at end of file
+});